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If you look at these pictures if this what you are talking about then your pup may have cow hocks. (Where the ankles come together but the feet stick out)
This is usually due to poor breeding. It would help if you let the dog do some incline walking to strengthen the muscles or the rear limbs but you cannot make them go away, it will always be like that.
You can also help by giving a joint supplement such as cosequin to the dog to help the joints in that area. You can also buy food that has glucosamine and chondroitin in it to help now.
Because this is a small dog you will want to have your vet check the knees as well as smaller breeds are prone to patella luxaction where the knee cap goes in and out of its joint. This can be painful.
Yes it can happen on the front legs. This is a sign of a poorly bred dog. You can see some pictures here http://www.dogbreedinfo.com/care/structuredogsbody.htm
Here are other links to help you, but I would get her examined sooner rather than later.